A school house, a library, a town meetinghouse and old railroad abutments are the four newest additions to the New Hampshire State Register of Historic Places.

In addition to preserving cultural significance, a designation as a historical site can make properties eligible for grants and give relief from some building regulations. The four properties were added to the list this week.

The abutments once held up the Letter S Road Railroad trestle in Alton, forming a piece of the Cocheco Railroad line that provided service to Boston and Maine from the mid-1700s all the way through the Great Depression. The railroad trestle is gone, but the abutments, pier and rail bed remain in place.

Center Harbor's Village School was built in 1886 as a one-room school, and additions and a playground were later added.

In Mont Vernon, an old town meetinghouse built in the Greek Revival style has been added to the list. It was built from oak timbers on a town hilltop in 1781 and was moved once in 1837.

In Rindge, the longstanding town library is receiving historical recognition. The Ingalls Memorial Library has been the town's only dedicated public library throughout its history. The library is named for Thomas Ingalls, a Rindge resident and son of a Revolutionary War solider. It opened in 1894.